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During which phase change does the entropy of a sample of H2O increase?

1. H2O(g) -> H2O(l)
2. H2O(g) -> H2O(s)
3. H2O(l) -> H2O(g)
4. H2O(l) ->H2O(s)

Respuesta :

Answer: 3. H2O(l) -> H2O(g)

Explanation: Entropy is a measure of the randomness or disorder a substance. Gasses have the greatest amount of entropy and solids have the least amount of entropy. The entropy of a sample of H2O increases as liquid water evaporates and changes to a gas.

The entropy of a sample of H2O increases when the phase of change that is  H2O(l) -> H2O(g) occurs. This is because entropy increases when a substance undergoes sublimation (solid to gas) or evaporation (liquid to gas).

What is meant by entropy?

  • The entropy of an object is a measure of the amount of energy that is unavailable to do work.
  • Entropy depends upon the randomness of molecules, number of molecules, and heat content.

During which phase does entropy increase?

  • A substance in the solid phase has low entropy.
  • A substance in the liquid phase has medium entropy.
  • A substance in the gas phase has high entropy.
  • When a substance goes from a solid to a gas (sublimation) or from a liquid to a gas (evaporation), entropy increases.

When the given sample of H2O changes its phase from liquid to gas, the entropy increases. It also happens when it changes from solid to gas.

Thus, option 3: H2O(l) -> H2O(g), the entropy increases.

Learn more about the entropy here:

https://brainly.com/question/16718133

https://brainly.com/question/17113982

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